Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "k6"   was replaced by   "k^6". 

Step  1  :

Multiplying exponential expressions :

 1.1    k²¹⁶ multiplied by k⁶⁴ = k^{(216 + 64)} = k²⁸⁰

Final result :

  k280